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We are planning to buy a Quad Core web server where we are installing with 500GB HDD can we go for SATA II or RAID 1?

We are planning to buy a Quad Core web server for our newly starting web hosting company,can we go with 500GB SATA II or RAID 1? What will be the difference?
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500GB SATA II is just a hard drive type

RAID 1 is a mirroring system

to use RAID 1 you would have to have 2 x 500GB HDD's

RAID copys your data from 1 to the other - i.e 2 x 500gb hdds with raid 1 will just show as 1 single hdd of 500gb as the other one is a constant mirror so if one fails you have a instant replacement

This shows you what RAID is and does and the different types

SATA II is just a HDD type like IDE etc

SATA II is fine but raid you will require more than 1 HDD
For a web hosting company RAID is a must

If you do not have raid and have a hdd drive failure you would lose everything

naturally if you have backups then that is a plus but you would still have to re-create the server = downtime

Raid ensures that with a hdd failure the machine will keep going and the faulty hdd can be swapped out and replaced with a newly formatted one which will rebuild itself with all the data required to get itself back up to the same level as the other hdd or hdd's - depending on your RAID choices
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